|qmake:||QT += knx|
|QKnxNetIpTunnelingRequestProxy(const QKnxNetIpFrame &frame)|
Tunneling means that Engineering Tool Software (ETS) sends a single KNX frame in an KNXnet/IP frame and waits until the response arrives or a time-out is reached.
A tunneling request is sent by a KNXnet/IP client to establish a data connection to the endpoint of a KNXnet/IP server for sending a KNX frame. A tunneling request frame contains the ID of the communication channel between a KNXnet/IP client and server, the sequence number of the frame, and the KNX frame in the common external message interface (cEMI) format.
The KNXnet/IP server discards frames with sequence numbers that are not the expected sequence numbers or one less the expected sequence numbers and does not send a tunneling acknowledgment upon receiving them.
Before sending a tunneling request, the KNXnet/IP client should use QKnxNetIpServerDescriptionAgent and QKnxNetIpServerInfo to check that the server supports the requested connection type and options.
Note: When using QKnxNetIpTunnelingRequestProxy, care must be taken to ensure that the referenced KNXnet/IP frame outlives the proxy on all code paths, lest the proxy ends up referencing deleted data.
The following code sample illustrates how to read the tunneling request information sent by a KNXnet/IP client:
Member Function Documentation
QKnxNetIpTunnelingRequestProxy::QKnxNetIpTunnelingRequestProxy(const QKnxNetIpFrame &frame)
Constructs a proxy object to read the tunneling request information carried by the specified KNXnet/IP frame frame.
[static] QKnxNetIpTunnelingRequestProxy::Builder QKnxNetIpTunnelingRequestProxy::builder()
Returns a builder object to create a KNXnet/IP tunneling request frame.
QKnxLinkLayerFrame QKnxNetIpTunnelingRequestProxy::cemi() const
Returns the KNX frame in the cEMI format.
quint8 QKnxNetIpTunnelingRequestProxy::channelId() const
Returns the ID of the communication channel between a KNXnet/IP client and server.
true if the frame contains initialized values and is in itself valid, otherwise returns
false. A valid KNXnet/IP frame consists of at least a valid header and a size in bytes corresponding to the total size of the KNXnet/IP frame header.
See also QKnxNetIpFrameHeader::totalSize().
quint8 QKnxNetIpTunnelingRequestProxy::sequenceNumber() const
Returns the sequence number of a tunneling request frame.
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